(Loss) Earnings Per Share - Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Class of Stock [Line Items]
Net (loss) income - Basic and Diluted	$ (2,746)	$ 1,975	$ (35,211)	$ (12,087)
Weighted average common shares outstanding - Basic (in shares)	56,899	54,578	55,523	54,430
Assumed conversions:
Weighted average common shares outstanding - Diluted (in shares)	56,899	54,947	55,523	54,430
Basic (loss) earnings per common share (in dollars per share)	$ (0.05)	$ 0.04	$ (0.63)	$ (0.22)
Diluted (loss) earnings per common share (in dollars per share)	$ (0.05)	$ 0.04	$ (0.63)	$ (0.22)
Stock Options
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	345	0	0
Restricted Stock Units
Assumed conversions:
Incremental common shares from stock options and restricted stock units (in shares)	0	24	0	0